Affiliation: | 1. PG Research and Department of Physics, AVVM Sri Pushpam College, Poondi 613 503, Tamil Nadu, India;2. Department of Physics, Government Arts College for Men (Autonomous), Kumbakonam 612 001, Tamil Nadu, India;1. P.G. & Research Department of Chemistry, Government Arts College (Autonomous), Coimbatore 641 018, India;2. P.G. & Research Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science (Autonomous), Coimbatore 641020, India |